Theoretical and Experimental Resolution of Semi-Derivative Linear Scan Voltammetry

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Title:Theoretical and Experimental Resolution of Semi-Derivative Linear Scan Voltammetry
Creators:
Bobrowski, Andrzej
Kasprzyk, Grzegorz
Mocák, Ján
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 65, 6, pp. 979-994
Uncontrolled Keywords:Indium, Lead, Semi-differentiation, Cadmium, Qualitative resolution, Thallium, Electroreductions, Quantitative resolution, Semi-derivative linear scan voltammetry

Abstract

New procedures, based on the transformation of voltammetric current by semi-differentiation, have been proposed to improve resolution in linear scan voltammetry (LSV). For a reversible charge transfer, the obtained shape of the current semi-derivative is fully symmetrical and even in the case of an irreversible electrode reaction it is considerably more symmetrical compared with the original LSV signal. To evaluate and compare the resolution of semi-derivative linear scan voltammetry (SDLSV) with other techniques, theoretical calculations were performed to determine the qualitative resolution as well as the quantitative resolution defined in our previous work. The following quantities have been calculated: (i) the minimal difference in the peak potentials of two depolarisers, necessary to obtain two distinct peaks on an SDLSV record, (ii) the difference in the peak potentials enabling the determination of the depolarisers with only a 1% systematic error, due to overlapping. Verification of the developed theory was performed experimentally using a set of solutions containing two electroactive components in 1 M HCl: Pb(II)-Tl(I), Pb(II)-In(III), Pb(II)-Cd(II), Tl(I)-In(III), Tl(I)-Cd(II), and In(III)-Cd(II). The proposed mathematical approach and experimental procedures enable a simultaneous SDLSV determination of two or even more depolarisers with a minimal error. <p>

Title:Theoretical and Experimental Resolution of Semi-Derivative Linear Scan Voltammetry
Creators:
Bobrowski, Andrzej
Kasprzyk, Grzegorz
Mocák, Ján
Uncontrolled Keywords:Indium, Lead, Semi-differentiation, Cadmium, Qualitative resolution, Thallium, Electroreductions, Quantitative resolution, Semi-derivative linear scan voltammetry
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:65
Number:6
Page Range:pp. 979-994
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20000979UNSPECIFIED
ID Code:1693
Item Type:Article
Deposited On:06 Feb 2009 17:11
Last Modified:06 Feb 2009 16:11

Citation

Bobrowski, Andrzej; Kasprzyk, Grzegorz; Mocák, Ján (2000) Theoretical and Experimental Resolution of Semi-Derivative Linear Scan Voltammetry. Collection of Czechoslovak Chemical Communications, 65 (6). pp. 979-994. ISSN 0010-0765

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